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CN-224229215-U - Gear box

CN224229215UCN 224229215 UCN224229215 UCN 224229215UCN-224229215-U

Abstract

The utility model provides a gearbox, and belongs to the technical field of gearboxes. The planetary gear solves the problems of low transmission efficiency and easy abrasion of the planetary gears in the prior art. The planetary gear assembly comprises an outer gear ring, a planetary gear, a sun gear and a planet carrier, wherein inner connecting teeth are formed in the outer gear ring, the planetary gear is in meshed connection with the inner connecting teeth, a bearing hole is formed in the planetary gear, a double-row ball bearing is arranged in the bearing hole, a connecting hole is formed in the end of the planet carrier, a gear shaft penetrates through the inside of the double-row ball bearing, one end of the gear shaft penetrates through the connecting hole, a fixing plate is sleeved on the end, extending out of one side of the planet carrier, of the gear shaft, the fixing plate is attached to one side of the planet carrier, a fixing hole is formed in the fixing plate, a plurality of first fastening bolts are fixedly installed in the fixing hole, and the first fastening bolts penetrate through the fixing hole and are fixedly connected with the planet carrier and the gear shaft. The utility model has the advantages of good planetary gear transmission efficiency, difficult abrasion and good lubricating and cooling effects.

Inventors

  • JIN QIANCHENG

Assignees

  • 浙江瑞发机械有限公司

Dates

Publication Date
20260512
Application Date
20250723

Claims (5)

  1. 1. The transmission comprises a front shell (1), a rear shell (2), a planetary gear (32) component (3), an oil nozzle component (4), an input shaft (5) and an output shaft (6), and is characterized in that the planetary gear (32) component (3) and the oil nozzle component (4) are arranged inside the front shell (1) and the rear shell (2), the planetary gear (32) component (3) comprises an external gear ring (31), a planetary gear (32), a sun gear (32) and a planet carrier (34), an internal connecting tooth (311) is formed inside the external gear ring (31) and the planetary gear (32) is in meshed connection with the internal connecting tooth (311), a bearing hole (321) is formed inside the planetary gear (32), a double-row ball bearing (35) is arranged in the double-row bearing hole (321), a connecting hole (341) is formed at the end part of the planet carrier (34), a gear shaft (36) is arranged inside the double-row ball bearing (35) in a penetrating way, one end of the gear shaft (36) penetrates through the connecting hole (341), an end part of the gear shaft (36) extends out of the carrier (34) to form an inner connecting plate (37), a fixing plate (37) is arranged on one side of the planet carrier (37) and a fixing plate (37) is formed on one side, a plurality of first fastening bolts (7) are fixedly installed in the fixing holes (371), the first fastening bolts (7) penetrate through the fixing holes (371) and are fixedly connected with the planet carrier (34) and the gear shaft (36), the sun gear (33) is meshed with the inner side of the planet gear (32), and a connecting cylinder (331) is formed at one end of the sun gear (33).
  2. 2. A gear box according to claim 1, wherein the oil nozzle assembly (4) comprises an oil nozzle seat (41) and an oil nozzle rod (42), the oil nozzle seat (41) is connected with the connecting cylinder (331), the oil nozzle rod (42) is fixedly arranged on two sides of the oil nozzle seat (41) and communicated with the inside of the oil nozzle seat (41), and one end of the input shaft (5) is connected with the oil nozzle seat (41).
  3. 3. The gearbox of claim 1, wherein an installation table (342) is formed at the center of the planet carrier (34), a plurality of bolt holes (343) are formed in the installation table (342), the bolt holes (343) are in a step shape, the inner caliber of the bolt holes (343) is larger than the outer caliber, the installation table (342) is attached to the end face of the output shaft (6), a second fastening bolt (8) is arranged in the bolt holes (343) in a penetrating mode, and one end, extending out of the bolt holes (343), of the second fastening bolt (8) is fixedly connected with the output shaft (6).
  4. 4. A gearbox according to claim 1, wherein the input shaft (5) is externally sleeved with an input shaft bearing (51), and the output shaft (6) is externally sleeved with an output shaft bearing (61).
  5. 5. A transmission according to claim 1, wherein connecting rings (312) are formed on both sides of the external gear ring (31), and the front housing (1) and the rear housing (2) are respectively connected with the connecting rings (312) on both sides of the external gear ring (31).

Description

Gear box Technical Field The utility model belongs to the technical field of gearboxes, and relates to a gearbox. Background The planetary gearbox is a transmission device taking a planetary gear mechanism as a core, is widely applied to the fields of automobiles, engineering machinery and the like, can complete complex power transmission in a limited space, and is a key component part of an automatic gearbox, a hybrid system and the like. The chinese patent with the patent publication number CN217301461U discloses a planetary gear of an automobile gearbox, which comprises an outer gear ring and an inner gear block, wherein an inner connecting gear is arranged inside the outer gear ring, a second clamping groove is formed in the inner surface of the outer gear ring, an inner gear arc is arranged on the inner side of the outer gear ring, an inner gear block is integrally arranged on the inner surface of the inner gear arc, a first clamping groove is formed in one end of the inner gear arc, a slot is formed in the other end of the inner gear arc, and a limit clamping block is arranged in the slotted inner portion of the other end of the inner gear arc. In the planetary gear of the automobile gearbox, as can be seen from the specification and the attached drawings, only the shaft hole is formed in the center of the internal connecting gear, the hole for placing the bearing is not formed, the bearing is not arranged, sliding friction is generated between the internal connecting gear and the shaft, the transmission efficiency is reduced, and the internal connecting gear is easy to wear and has short service life. Disclosure of utility model The object of the present utility model is to solve the above-mentioned problems occurring in the prior art and to provide a gearbox. The transmission comprises a front shell, a rear shell, a planetary gear assembly, an oil nozzle assembly, an input shaft and an output shaft, wherein the planetary gear assembly and the oil nozzle assembly are arranged in the front shell and the rear shell, the planetary gear assembly comprises an outer gear ring, a planetary gear, a sun gear and a planet carrier, inner connecting teeth are formed in the outer gear ring, the planetary gear is meshed with the inner connecting teeth, a bearing hole is formed in the planetary gear, a double-row ball bearing is arranged in the bearing hole, a connecting hole is formed in the end portion of the planet carrier, a gear shaft penetrates through the inside of the double-row ball bearing, one end of the gear shaft penetrates through the connecting hole, a fixing plate is sleeved on the end portion of one side, extending out of the planet carrier, of the fixing plate is attached to one side of the planet carrier, a fixing hole is formed in the fixing plate, a plurality of first fastening bolts penetrate through the fixing holes and are fixedly connected with the planet carrier and the gear shaft, the sun gear is meshed with the inner side of the planet gear, and a connecting cylinder is formed at one end of the sun gear. In the gearbox, the oil nozzle assembly comprises an oil nozzle seat and an oil nozzle rod, the oil nozzle seat is connected with the connecting cylinder, the oil nozzle rod is fixedly arranged on two sides of the oil nozzle seat and is communicated with the inside of the oil nozzle seat, and one end of the input shaft is connected with the oil nozzle seat. In the gearbox, an installing table is formed in the center of the planet carrier, a plurality of bolt holes are formed in the installing table, the bolt holes are in a step shape, the inner caliber of each bolt hole is larger than the outer caliber, the installing table is attached to the end face of the output shaft, a second fastening bolt penetrates through the bolt holes, and one end, extending out of the bolt hole, of each second fastening bolt is fixedly connected with the output shaft. In the gearbox, an input shaft bearing is sleeved outside the input shaft, and an output shaft bearing is sleeved outside the output shaft. In the above-mentioned gearbox, the outer gear ring both sides are formed with the connector ring body, and front casing and rear casing are connected with the connector ring body of outer gear ring both sides respectively. Compared with the prior art, the gearbox has the advantages that 1, bearing holes are formed in the planet gears and ball bearings are arranged in the planet gears, rolling friction is formed between the planet gears and the gear shafts, the ball bearings evenly transmit radial loads of the planet gears to the gear shafts through rolling bodies, local stress concentration and severe abrasion caused by direct contact between inner holes of the gears and the shafts in a bearingless structure are avoided, 2, the gear shafts are fixed with the planet carrier through fixing plates and first fastening bolts to form a rigid connection structure, loads born by the planet gears are dispersed, loca